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Results 1 - 2 of 2 for Bronchioles
  1. Clean Air at Home Video (American Lung Association)  
    ... The bronchi then separate into small tubes called bronchioles. Like tree branches, bronchioles divide into thousands of even smaller passages. At the end of each bronchiole is a cluster of little air sacs called ...
  2. ... further divide into smaller and smaller branches called bronchioles. The smallest bronchioles end in tiny air sacs. These are called ...